Formatt Hitech 37mm Combination Light Balancing 81EF/ND 0.9 Glass Filter

Formatt Hitech 37mm Combination Light Balancing 81EF/ND 0.9 Glass Filter

Formatt Hitech 37mm Combination Light Balancing 81EF/ND 0.9 Glass Filter

B&H # FO81EFND.937 MFR # BF 37-81EFND.9
Formatt Hitech 37mm Combination Light Balancing 81EF/ND 0.9 Glass Filter

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  • 1Description

The Formatt 37mm Combination Light Balancing 81EF/Neutral Density (ND) 0.9 Schott-Desag B270 Crown Optical Glass Filter combines the effects of an 81EF Light Balancing filter with a Neutral Density filter.

81EF
An 81EF filter (the strongest in the 81 series) will more than replace the yellow missing from the image and place all skin tones on a distinctly "warmish" level.

Neutral Density (ND)
ND filters appear grey and reduce the amount of light reaching the film. They have no effect on color balance. They are very useful when you want to shoot high-speed film outdoors on a very bright day.

Often it is necessary or desirable to balance the light intensity in one part of a scene with another. This is especially true in situations where you don't have total light control, as in bright contrasty landscapes. Exposing for the foreground will produce a washed-out, over-exposed sky while exposing for the sky will leave the foreground dark and under-exposed. This filter enables cloud detail to be kept correctly exposed in the picture.

Determining which graduated neutral density filter yields ideal results for any given lighting situation takes knowledge, experience and a collection of such filters. Choose the filter strength which adjusts the lighting to stay within the exposure latitude (greatest difference between bright/dark values) which still shows details in both of the digital or film medium in use.

Speaking generally, the 2-stop value (ND 0.6 - the filter's clear portion allows 4x more light to pass vs. darkest portion) effectively compensates average bright sky-to-foreground situations, and the soft transition is applicable more often to a scene than the hard transition

Formatt, a company with three generations of professional filter-making experience, produces every filter to the highest technical standards. The finest materials, together with state of-the-art production technology, have resulted in a standard of optical excellence unmatched anywhere else.

Neutral Density Filters Have Four Main Uses

To enable slow shutter speeds to be used, especially with high-speed films, to record movement in subjects such as waterfalls, clouds, or cars
To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background
To decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situations
To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure

Neutral Density Factors

ND.3 (exposure adjustment = 1 stop, reduces ISO 1/2)
ND.6 (exposure adjustment = 2 stops, reduces ISO 1/4)
ND.9 (exposure adjustment = 3 stops, reduces ISO 1/8)
ND 1.2 (exposure adjustment = 4-stops, reduces ISO 1/16)
In the Box
Formatt Hitech 37mm Combination Light Balancing 81EF/ND 0.9 Glass Filter
  • One-Year Warranty
  • Table of Contents
    • 1Description
    Filter Type Solid ND Combination
    Combination Type 81EF Color Conversion
    Density 0.9 (3 Stops)
    Shape Circle
    Circular Size 37 mm
    Rotating No
    Front Thread / Bayonet 37 mm
    Filter Material Glass
    Coating Multi-Coated
    Packaging Info
    Package Weight 0.1 lb
    Box Dimensions (LxWxH) 2.0 x 2.0 x 2.0"

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